Check again, they arent congruent that way, how do you know that BDA is 35 and not 95, how do you find it?? I know all the properties of the isosc trap, I'm struggling proving that it is 95 guys.. The vertices dont match the angles that should be congruent either..

Check again, they arent congruent that way, how do you know that BDA is 35 and not 95, how do you find it?? I know all the properties of the isosc trap, I'm struggling proving that it is 95 guys.. The vertices dont match the angles that should be congruent either..

If you label the point at the centre "O",
then do you see that triangles BOC and AOD are identical ?